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Drivers: net: hyperv: Enable receive side IP checksum offload 

Enable receive side checksum offload.

Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Reviewed-by: Haiyang Zhang <haiyangz@microsoft.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
KY Srinivasan 2014-03-08 19:23:16 -08:00 committed by David S. Miller
parent 4a0e70ae5e
commit e3d605ed44
3 changed files with 50 additions and 6 deletions
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33
drivers/net/hyperv/hyperv_net.h
View File

@ -30,6 +30,7 @@
/* Fwd declaration */
struct hv_netvsc_packet;
struct ndis_tcp_ip_checksum_info;
/* Represent the xfer page packet which contains 1 or more netvsc packet */
struct xferpage_packet {
@ -117,7 +118,8 @@ int netvsc_send(struct hv_device *device,
void netvsc_linkstatus_callback(struct hv_device *device_obj,
unsigned int status);
int netvsc_recv_callback(struct hv_device *device_obj,
struct hv_netvsc_packet *packet);
struct hv_netvsc_packet *packet,
struct ndis_tcp_ip_checksum_info *csum_info);
int rndis_filter_open(struct hv_device *dev);
int rndis_filter_close(struct hv_device *dev);
int rndis_filter_device_add(struct hv_device *dev,
@ -776,9 +778,38 @@ struct ndis_offload_params {
};
};
struct ndis_tcp_ip_checksum_info {
union {
struct {
u32 is_ipv4:1;
u32 is_ipv6:1;
u32 tcp_checksum:1;
u32 udp_checksum:1;
u32 ip_header_checksum:1;
u32 reserved:11;
u32 tcp_header_offset:10;
} transmit;
struct {
u32 tcp_checksum_failed:1;
u32 udp_checksum_failed:1;
u32 ip_checksum_failed:1;
u32 tcp_checksum_succeeded:1;
u32 udp_checksum_succeeded:1;
u32 ip_checksum_succeeded:1;
u32 loopback:1;
u32 tcp_checksum_value_invalid:1;
u32 ip_checksum_value_invalid:1;
} receive;
u32 value;
};
};
#define NDIS_VLAN_PPI_SIZE (sizeof(struct rndis_per_packet_info) + \
sizeof(struct ndis_pkt_8021q_info))
#define NDIS_CSUM_PPI_SIZE (sizeof(struct rndis_per_packet_info) + \
sizeof(struct ndis_tcp_ip_checksum_info))
/* Format of Information buffer passed in a SetRequest for the OID */
/* OID_GEN_RNDIS_CONFIG_PARAMETER. */
struct rndis_config_parameter_info {

19
drivers/net/hyperv/netvsc_drv.c
View File

@ -391,7 +391,8 @@ void netvsc_linkstatus_callback(struct hv_device *device_obj,
* "wire" on the specified device.
*/
int netvsc_recv_callback(struct hv_device *device_obj,
struct hv_netvsc_packet *packet)
struct hv_netvsc_packet *packet,
struct ndis_tcp_ip_checksum_info *csum_info)
{
struct net_device *net;
struct sk_buff *skb;
@ -418,7 +419,17 @@ int netvsc_recv_callback(struct hv_device *device_obj,
packet->total_data_buflen);
skb->protocol = eth_type_trans(skb, net);
skb->ip_summed = CHECKSUM_NONE;
if (csum_info) {
/* We only look at the IP checksum here.
* Should we be dropping the packet if checksum
* failed? How do we deal with other checksums - TCP/UDP?
*/
if (csum_info->receive.ip_checksum_succeeded)
skb->ip_summed = CHECKSUM_UNNECESSARY;
else
skb->ip_summed = CHECKSUM_NONE;
}
if (packet->vlan_tci & VLAN_TAG_PRESENT)
__vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),
packet->vlan_tci);
@ -578,8 +589,8 @@ static int netvsc_probe(struct hv_device *dev,
net->netdev_ops = &device_ops;
/* TODO: Add GSO and Checksum offload */
net->hw_features = NETIF_F_SG;
net->features = NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_SG;
net->hw_features = NETIF_F_RXCSUM | NETIF_F_SG;
net->features = NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_SG | NETIF_F_RXCSUM;
SET_ETHTOOL_OPS(net, &ethtool_ops);
SET_NETDEV_DEV(net, &dev->device);

4
drivers/net/hyperv/rndis_filter.c
View File

@ -350,6 +350,7 @@ static void rndis_filter_receive_data(struct rndis_device *dev,
struct rndis_packet *rndis_pkt;
u32 data_offset;
struct ndis_pkt_8021q_info *vlan;
struct ndis_tcp_ip_checksum_info *csum_info;
rndis_pkt = &msg->msg.pkt;
@ -388,7 +389,8 @@ static void rndis_filter_receive_data(struct rndis_device *dev,
pkt->vlan_tci = 0;
}
netvsc_recv_callback(dev->net_dev->dev, pkt);
csum_info = rndis_get_ppi(rndis_pkt, TCPIP_CHKSUM_PKTINFO);
netvsc_recv_callback(dev->net_dev->dev, pkt, csum_info);
}
int rndis_filter_receive(struct hv_device *dev,